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Re: BTRFS file clone support for cp

From: Jim Meyering
Subject: Re: BTRFS file clone support for cp
Date: Thu, 30 Jul 2009 18:48:44 +0200

Ric Wheeler wrote:
> I think that doing reflink by default would be a horrible idea - one
> good reason to copy a file is to increase your level of fault
> tolerance and reflink magically avoids that :-)

Good point.
This would constitute another user-visible semantic change in cp:
a disk fault that affects any non-metadata block of a ref-linked file
affects both copies.

GNU cp will soon attempt this only when a --reflink option is specified.

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